package com.jiaojiao.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.jiaojiao.reggie.common.BaseContext;
import com.jiaojiao.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@Slf4j
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
public class LoginCheckFileter implements Filter {
    //路径匹配器，支持通配符
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //1,获取请求的URI
        String requestURI = request.getRequestURI();
        log.info("拦截到请求{}",requestURI);
        //不需要处理的请求路径
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/page/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"
        };
        //2,判断本次请求是否需要处理
        boolean check = check(urls,requestURI);
        //3,不需要处理哦
        if (check){
            log.info("本次不需要处理{}",requestURI);
            filterChain.doFilter(request,response);
            return;
        }
        //4,判断员工登录状态，如果已经登录，直接放行
        if (request.getSession().getAttribute("employee") != null){
            log.info("用户一登录，放行的id{}",request.getSession().getAttribute("employee"));
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setThreadLocal(empId);
            long id = Thread.currentThread().getId();
            log.info("当前线程id：{}",id);

            filterChain.doFilter(request,response);
            return;
        }
        //4,判断用户登录状态，如果已经登录，直接放行
        if (request.getSession().getAttribute("user") != null){
            log.info("用户一登录，放行的id{}",request.getSession().getAttribute("user"));
            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setThreadLocal(userId);
            filterChain.doFilter(request,response);
            return;
        }
        //5,未登录，返回未登录结果，以输出流的方式向客户端相应数据
        log.info("用户没有登录");
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
//        log.info("拦截到请求：{}",request.getRequestURI());
//        filterChain.doFilter(request,response);
    }
    //路径匹配，检查本次是否放行
    public boolean check(String[] urls,String requestURI){
        for (String url : urls){
            boolean match = PATH_MATCHER.match(url,requestURI);
            if (match){
                return true;
            }
        }
        return false;
    }
}
